55-8
HEATERS AND MANUAL AIR CONDITIONER
TROUBLESHOOTING QUICK-REFERENCE TABLE
Compressor doesn’t operate.
no.
4
5
6
7
8
9
switch terminals.
Criteria
point
I
Method
Probable cause
I
Remedy
Abnormal
No sound is
noted
Faulty magnetic clutch
Replace magnetic clutch.
No continuity
Faulty blower switch
Replace blower switch
No continuity
Faulty air conditioner
switch
Replace air conditioner
switch.
No continuity
Faulty air magnetic clutch
relay
Replace magnetic clutch
relay.
places where gas
continuity
Faulty dual-pressure switch
Replace dual-pressure
continuity
I
Faulty thermostat
switch.
Replace thermostat.
range of
3.9 to 4.1
Faulty
sensor
Replace
sensor
range of
Faulty air inlet sensor
Replace air inlet sensor.
If no abnormality noted at each inspection point after inspection
in the sequence shown in this quick-reference table, it is suspected that
the compressor
IS
Inoperative because of faulty air conditioner control unit. Therefore, replace the air conditioner control unit.
TSB Revision
Summary of Contents for 3000GT 1991
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